Lost cause

So my hubby has a problem with venting about our marriage to his co-workers, his cousins and friends on facebook. It really bothers me that he can’t keep our marital issues at home and not with his social circle It’s pretty one sided when he does that and the things he says are lies most of the time to make himself look good. He had a female distant cousin he met online and he even started talking about me badly to her over the phone and they never even met..she’s like a 6th cousin. I feel like i’m married to a stranger ☹️